A. 0.648 N
B. 6.48 N
C. 64.8 N
D. 648 N
2007-01-31 19:23:03 · 3 answers · asked by Jason 1 in Science & Mathematics ➔ Physics
A cube, made of an unknown material with a density of 2.4 g/cm³, has a dimension of 3 cm in length. What is the weight of the cube? (Taking acceleration due to gravity to be 10 m/s²)
2007-01-31 19:25:06 · update #1
Sorry, had to edit. OK now I think.
Use the formula: Density = Mass / Volume
Therefore, Mass = Density * Volume
= 2.4 * 3^3
= 64.8 g = 0.0648 kg
Now, Weight = Mass * Acceleration due to gravity
= 0.0648 * 10
= 0.648 N (Answer is A.)
2007-01-31 19:34:04 · answer #1 · answered by falzoon 7 · 0⤊ 0⤋
2.4 x 3 x 3 x 3 = 64.8 gms or 0.0648 kg. Assuming the gravitational pull as stated (factor of 10) the answer would be "A".
2007-02-01 03:48:05 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Mass = (3cm) (3cm) (3cm) (2.4 g/cm3)
Mass = 64.8 grams = 0.0648 Kg
Weight = (0.0648 kg) ( 10 m/s2)
Weight = (0.648 KN) = 648 N
2007-02-01 05:23:37 · answer #3 · answered by 2cute4u 2 · 0⤊ 0⤋